Sidelink Resource Pool Sharing for Mode-3 and Mode-4 UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In eV2X communication, static resource pool configurations lead to low resource utilization and collisions between UEs operating in different resource scheduling modes, as mode-3 UEs and mode-4 UEs cannot share resources effectively, resulting in inefficient use of available resources, especially at the cell edge.
Innovation Solution
User Equipment (UE) operated in a base station-based scheduling mode selects candidate resources based on sensing results within a resource selection window, reporting them to the base station while adhering to latency, interference, and Channel Business Ratio (CBR) requirements, enabling resource pool sharing between mode-3 and mode-4 UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static resource pool configuration is used for mode-3 and mode-4 UEs separately, then resource pool management is simple, but resource utilization is low and resource collisions occur
Solution Approach 1:
The patent merges mode-3 and mode-4 resource pools into a shared resource pool, allowing both scheduling modes to access the same time-frequency resources. This combining approach eliminates resource waste and reduces collisions by enabling dynamic resource sharing between base station-scheduled and autonomous UEs
Solution Approach 2:
The shared resource pool serves multiple functions: it supports both mode-3 (base station-based) and mode-4 (autonomous) scheduling modes simultaneously. The resource pool becomes universal, accommodating different scheduling strategies and UE types without requiring separate dedicated pools for each mode
2Ease of operation
If separate resource pools are configured for mode-3 and mode-4 UEs, then resource allocation is simple and straightforward, but resource collisions occur and resource utilization decreases
Solution Approach 1:
The patent introduces dynamic resource allocation mechanisms where mode-4 UEs autonomously select resources based on sensing results and CBR conditions. The resource allocation becomes dynamic rather than static, allowing UEs to adaptively choose available resources and avoid collisions through sensing-based resource selection
Solution Approach 2:
The patent implements feedback mechanisms where mode-4 UEs perform sensing on the shared resource pool, measure CBR values, and adjust their resource selection accordingly. The feedback loop includes sensing results, CBR evaluation, and resource selection decisions, enabling collision avoidance through continuous monitoring and adaptation
3Adaptability or versatility
If mode-4 UEs autonomously select resources without base station coordination, then resource selection flexibility is high, but resource collisions with mode-3 UEs increase
Solution Approach 1:
The patent introduces CBR (Channel Busy Ratio) as an intermediary mechanism that mediates between mode-3 and mode-4 UEs. The CBR metric provides a shared view of resource utilization, allowing mode-4 UEs to make informed decisions about resource selection while being aware of mode-3 UE activity, thus reducing collisions while maintaining autonomy
Data Source
AI summary
Provided are a user equipment, base station and wireless communication methods related to resource pool sharing between UEs in different resource scheduling modes for sidelink communication. A user equipment which is operated in a base station-based scheduling mode for sidelink transmission comprises: circuitry operative to select candidate resources for at least data channels from resources in a resource selection window based on the result of sensing performed in a sensing window which is before the resource selection window, the beginning time of the resource selection window being no earlier than a service arrival time; and a transmitter operative to report at least part of the selected candidate resources to a base station, wherein the selection of the candidate resources follows at least one of the following rules: the time period from the service arrival time to the ending time of the resource selection window is no greater than a threshold latency; for a case of non-adjacent scheduling between a data channel and a control channel, both the interference of the selected candidate resource for a data channel and the interference of the resource for a control channel which is uniquely mapped with the data channel are no greater than a threshold interference, or for a case of adjacent scheduling between a data channel and a control channel, the interference of the selected candidate resource for a data channel is no greater than a threshold interference; and the selected candidate resources and associated radio parameters meet a Channel Business Ratio (CBR) requirement.